Dual Optical System Lens Switching for Focus Alignment
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Solution Overview
Problem
Existing lens apparatuses with left and right optical systems struggle to eliminate focus differences between images, leading to an uncomfortable viewing experience due to parallax issues, and lack flexibility in adjusting focus modes.
Innovation Solution
A lens apparatus with two optical systems that can switch between autofocus and manual focus modes, allowing independent movement of each optical system along the optical axis to adjust focus positions and eliminate image differences, using driving units and manual focus operation rings for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If both optical systems are simultaneously adjusted using rotation operation of a focus dial, then focusing operation is simplified, but focus difference between left and right images cannot be eliminated
Solution Approach 1:
The focusing operation is segmented into two distinct modes: a first focusing mode for simultaneous adjustment of both optical systems, and a second focusing mode for adjusting only one optical system to eliminate focus difference. This segmentation allows each mode to optimize for its specific purpose, resolving the contradiction between ease of operation and focus alignment accuracy.
Solution Approach 2:
The lens apparatus dynamically switches between two different driving modes based on operational needs. The first driving mode performs autofocus by moving both optical systems simultaneously, while the second driving mode adjusts focus difference by moving only one optical system. This dynamic switching enables the system to adapt to different focusing requirements, maintaining both ease of operation and precision.
2Device complexity
If a single focusing mode is used for both simultaneous adjustment and focus difference elimination, then device complexity is reduced, but adaptability to different focusing needs deteriorates
Solution Approach 1:
A single driving unit is designed to perform multiple functions by switching between two driving modes. The first driving mode handles simultaneous autofocus adjustment of both optical systems, while the second driving mode handles focus difference elimination by adjusting one optical system. This multi-functionality maintains device simplicity while providing adaptability to different focusing needs.
Solution Approach 2:
The focusing control system dynamically adapts its behavior based on the required operation. The control unit switches between first and second driving modes depending on whether simultaneous adjustment or focus difference elimination is needed. This dynamic capability allows the system to be versatile without requiring separate complex control mechanisms for each function.
3Productivity
If autofocus is performed on both optical systems simultaneously, then imaging efficiency is improved, but ability to independently adjust focus positions deteriorates
Solution Approach 1:
The autofocus operation is segmented into two phases: first, simultaneous autofocus adjustment of both optical systems to achieve efficient imaging; second, independent adjustment of one optical system to eliminate focus difference. This segmentation allows the system to benefit from both simultaneous adjustment efficiency and independent adjustment capability.
Solution Approach 2:
The driving unit dynamically switches between first and second driving modes. In the first mode, both optical systems are adjusted simultaneously for efficient imaging. In the second mode, only one optical system is adjusted for independent focus position control. This dynamic switching resolves the contradiction between imaging efficiency and independent adjustment capability.
Data Source
AI summary
A lens apparatus attachable to an image pickup apparatus includes a first optical system, a second optical system, and a driving unit that moves at least one of the first optical system and the second optical system in an optical axis direction. The lens apparatus is configured to switch between a first driving mode for performing autofocus by moving both the first optical system and the second optical system in optical axis directions of the first optical system and the second optical system via the driving unit, and a second driving mode for adjusting a difference in imaging position for a same object image between the first optical system and the second optical system by moving the at least one of the first optical system and the second optical system in the optical axis direction via the driving unit.